Set the draw transparency for fills
void PgSetFillTransPat( PgPattern_t pat ); void PgSetFillTransPatCx( PhGC_t *gc, PgPattern_t pat );
ph
These functions set a masking pattern and applies it to fills. You should use them in combination with PgSetFillColor*() or PgSetFillDither*().
PgSetFillTransPat() works on the current graphics context, while you can specify the graphics context gc for PgSetFillTransPatCx().
These functions use the same patterns as PgSetFillDither*(), To disable transparency and draw normally, specify the Pg_PAT_DEFAULT pattern.
Because of speed considerations, some graphics drivers don't draw strokes with a transparency mask and, as a result, ignore the stroke transparency pattern. |
// let background show through for half the pixels PgSetFillTransPat( Pg_PAT_HALF ); // disable transparency mask, draw normally PgSetFillTransPat( Pg_PAT_DEFAULT );
Photon
Safety: | |
---|---|
Interrupt handler | No |
Signal handler | No |
Thread | No |
PgDefaultFill*(), PgSetDrawMode*(), PgSetFillColor*(), PgSetFillDither*(), PgSetFillXORColor*(), PgSetStrokeTransPat*(), PgSetTextTransPat*()
“Drawing attributes” and “Arcs, ellipses, polygons, and rectangles” in the Raw Drawing and Animation chapter of the Photon Programmer's Guide